NOTE: U.S. state surface trade value equals imports to the U.S. state of destination
plus exports from the U.S. state of origin. The U.S. state of destination reflects
the state of the importer of record. This state may not always represent the
ultimate physical destination of shipments. The U.S. state of origin typically
reflects the state of origin where the goods were grown, manufactured or otherwise
produced. In some instances, however, it may not always reflect the actual state
of physical origin. Shipments for Hawaii are intermodal and are included in
this dataset, because a portion of the shipment moves by a land mode from either
its origin or final destination. Total for all U.S. states includes data where
the state of origin or destination was unknown.

SOURCE: U.S. Department of Transportation, Bureau of Transportation Statistics,
Transborder Surface Freight Data, as of January 2002.